In a SAF deployment, the registration status looks correct and the learned patterns appear reachable, but calls are not routed. What is causing this issue?

A.	network connection failure between the SAF Forwarder and Cisco Unified Communications Manager
B.	network connection failure between the primary and backup SAF Forwarders
C.	TCP connection failure with the primary SAF Forwarder
D.	TCP connection failure with the backup SAF Forwarder